The 22 sectional maps from Neison (1876) were an important component in developing the modern IAU lunar nomenclature. An example of using them can be found in the LPOD Photo Gallery Here are the data necessary for downloading and displaying copies of them with LTVT:

LPI Lunar Map Catalog

Note: the following map series can be downloaded using the provided URL lists and the LTVT Image Grabber. They can all be displayed from within LTVT, but calibration data is not provided because they are normally loaded using the Files...Load an LAC/LTO chart... menu. The procedure takes only a few seconds and there is (at present) no facility for remembering how to reload the maps in a later run. Note also that there are other resolution versions available on the LPI website and LTVT can display whichever ones you choose to download. The 150 dpi versions seem a good compromise between file size and resolution.

Note: the Geologic Atlas of the Moon uses a different map numbering system than the other series. For ease of identification, this list directs the LTVT Image Grabber to save them to disk with the LAC Zone preceding the USGS map number.